(19)

(11)

EP 2 630 711 A2

(12)

(88) Date of publication A3: 20.06.2013 (43) Date of publication: 28.08.2013 Bulletin 2013/35 (21) Application number: 11761197.0 (22) Date of filing: 09.09.2011

(51) International Patent Classification (IPC):  H02G 15/113(2006.01) (86) International application number: PCT/US2011/051002 (87) International publication number: WO 2012/054147 (26.04.2012 Gazette 2012/17)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR (30) Priority: 16.06.2011 US 201161497718 P 06.05.2011 US 201161483207 P 19.10.2010 US 394503 P (71) Applicant: 3M Innovative Properties Company Saint Paul, MN 55133-3427 (US)	(72) Inventors: DOWER, William V. Saint Paul, Minnesota 55133-3427 (US) TURNER, Scott D. Saint Paul, Minnesota 55133-3427 (US) DUPUIS, David Saint Paul, Minnesota 55133-3427 (US) WILDER, James G. Saint Paul, Minnesota 55133-3427 (US) SHOEMAKER, Curtis L. Saint Paul, Minnesota 55133-3427 (US) (74) Representative: Vossius & Partner  Siebertstrasse 4 81675 München 81675 München (DE)